<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
	
	var a = '123';
	var b = '123';
	var c = new String('123');

	var d = [1,2,3];
	var e = [1,2,3];
	var f = new Array(1,2,3);


	alert(a == b);//true o
	alert(a === b);//true o
	alert(a == c);//true o
	alert(b === c);//false o
	alert(d == e);//true *
	alert(e == f);//true *


</script>
</body>
</html>